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Analysis of Enterococcus from 2013-2022 showed a downward trend in the Geomean of Enterococcus Fecal Indicator Bacteria, ending at ~2,000 CFU/gallon In 2016, Geomean concentrations of Enterococcus reached as high as 750,000 CFU/gallon.
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Injected concentrations of Nitrogen from Kahuku Wastewater treatment plant from 2013-2022 showed an increasing trend with the highest value recorded in 2021 of ~8.5. mg/L.
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Injected concentration of Phosphorus from 2013-2022 showed a decreasing trend ending at a concentration of ~ 2.8 mg/L.
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Turbidity of the effluent at Kahuku Wastewater Treatment Plant from 2013-2022 is shown.
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Kahuku Wastewater Treatment Plant Water Quality History
Date Turbidity (NTU) Total Nitrogen (mg/L) Total Phosphorus (mg/L) Enterococcous Fecal Indicator Bacteria
(CFU/100mL)Enterococcous Fecal Indicator Bacteria
(CFU/gallon)12/16/2013 0.59 0.3 3.1 8200 310403 6/4/2014 0.42 1.7 3.2 9200 348257 12/15/2014 0.33 0.7 3.3 950 35961 6/17/2015 0.75 0.3 3.0 4600 174128 12/14/2015 0.56 0.6 2.8 1900 71922 6/27/2016 1.7 1.4 3.4 2200 83279 12/12/2016 1.7 1.1 3.6 20000 757082 6/5/2017 0.71 <0.2 3.9 3400 128703 12/18/2017 1.59 2.4 3.0 3600 136274 6/4/2018 1.05 1.8 3.6 9 340 6/3/2019 1.72 1.4 3.3 2400 90849 12/2/2019 0.58 0.5 2.8 26 984 12/10/2019 1.97 1.5 3.1 <0.9 34 6/9/2020 1.29 2 3.2 230 8706 12/7/2020 3.43 1.8 2.8 650 24605 6/14/2021 1.74 8.3 3.4 180 6813 12/6/2021 2.1 2.5 77 2914 12/20/2021 0.6 2.5 2.8 30 1135 6/15/2022 1.01 2.7 2.9 6 227 12/5/2022 0.92 0.8 2.9 59 2233